DNS amplification types of DDoS attacks doubled in the first quarter of 2018 over last quarter, and spiked nearly 700 percent year-over-year, according to Nexusguard.

Nexusguard’s Q1 2018 Threat Report, which analyzes thousands of global cyber attacks, reported that 55 of the attacks were due to exploited Memcached servers.

“Cyber attackers continue to seek new vulnerabilities to pursue more firepower, launching more amplification attacks through unguarded Memcached servers and poorly configured DNSSEC-enabled DNS servers the past two quarters, and we expect this trend to continue,” said Juniman Kasman, CTO for Nexusguard.